Karcher G 2500 OH User Manual
G 2500 OH
English ....................... 2
Español .................... 14
Français ................... 26
9.139-176 (10/05)
High Pressure Washer Operator Manual
Overview ........................................................................ 3
Precautions ................................................................... 4
Assembly Instructions .................................................. 5
Operating Instructions .................................................. 6
Using the Accessories .................................................. 7
Working with Detergents .............................................. 8
Shut Down and Clean-Up ............................................. 9
Taking a Break ............................................................... 9
Winterizing and Long-Term Storage ............................ 9
Cleaning Tips ......................................................... 10-11
Optional Cleaning Accessories .................................. 11
Troubleshooting ..................................................... 12-13
2
Specifications
Max. pressure 2500 PSI
Water volume 2.4 GPM
Detergent suction 0.15 – 0.20 GPM
Engine 5.0 HP Honda GC 160
Part No. 1.194-512
Serial No. ______________
Kärcher Customer Support USA
Call: 1-800-537-4129 for help
or visit our website:
www.karcher-usa.com
Kärcher Customer Service CDN
Call: 1-800-465-4980 for help
or visit our website:
www.karcher.ca
Model G 2500 OH OVERVIEW
Item Description
1 Handle
2 Trigger gun
3 Trigger gun safety lock
4 High pressure hose
5 Spray wand
6 Gas tank
7 Dipstick
8 Water inlet with garden hose connector
9 High pressure outlet
10 Detergent filter
11 Detergent suction tube
12 Spark plug
13 Quick connect nozzles
(white, red, green, black)
14 Hose Reel (optional) Mounting Holes
3
IMPORTANT PRECAUTIONS – Read First!
IMPORTANT SAFETY INSTRUCTIONS
WARNING When using this product basic precautions should always be followed,
including the following:
WARNING Risk of Injection or Injury
Do Not Direct Discharge Stream At Persons.
Read all the instructions before using the
product.
Fire hazard! Do not add fuel with the en-
gine running. Do not operate if fuel has
been spilled. Instead, move the machine
to a different location and avoid creating
sparks.
Operate and fuel machine in a well venti-
lated area, free of devices featuring an
open pilot or flame such as boilers, water heaters, etc.
High pressure jets can be dangerous if
subject to misuse. The jet must not be
directed at persons, animals, electrical
devices, or the machine itself.
4
Wear safety goggles.
Do not use acids, alkaline, solvents, or
any flammable material in this product.
These products can cause physical injuries to the operator and irreversible damage to the machine.
The machine has hot surfaces which can
cause burns. Operate the unit in a safe
environment and away from children.
Do not allow the high pressure hose to
come into contact with the muffler guard.
Do not leave the machine running unat-
tended.
Learn how to stop the machine and re-
lease pressure quickly. Be thoroughly fa-
miliar with the controls.
Stay alert watch what you are doing.
Do not operate the product when fatigued
or under the influence of alcohol or drugs.
Do not stand on unstable surfaces. Stand
with both feet balanced at all times.
Avoid tipping the machine on its side.
The Gun Safety Lock PREVENTS the
trigger from accidentally being engaged.
This safety feature DOES NOT lock trigger in the on position.
Do not spray electrical connections, elec-
trical outlets or fixtures.
Do not touch hot surfaces or allow acces-
sories to contact hot surfaces.
Do not operate in an enclosed space, ex-
haust fumes are dangerous.
Do not operate near utilities with open fla-
mes.
Do not operate pressure washer without
the water turned on.
Do not use hot water.
WATER SUPPLY (Cold Water Only)
Water hose must be at least 5/8 inch in
diameter.
Flow rate of water supply must not fall
below 2.6 GPM (gallons per minute).
Flow rate can be determined by running
the water for one minute into an empty
5-gallon container.
The water supply temperature must not
exceed 104°F/40°C.
Never use the pressure washer to draw
in water contaminated with solvents, e.g.
paint thinner, gasoline, oil, etc.
Always prevent debris from being drawn
into the unit by using a clean water
source.
We strongly recommend that this high pressure washer not be left running for periods
of 5 minutes or longer without the trigger
gun being engaged.
- SAVE THESE INSTRUCTIONS -
ASSEMBLY INSTRUCTIONS
Step 1
Attach the handle to the frame of the pressure washer. Align holes, insert bolts, and
tighten with knobs.
Step 2
Mount the nozzle holder and gun/hose storage handle.
Step 3
Place the quick connect nozzles in the
nozzle holder.
Step 5
Pull the spring-loaded collar of the wand
back to insert your choice of quick
connect nozzle.
Step 6
Release the collar and push the nozzle until
the collar clicks.
5
DANGER
High pressure in nozzle area.
Risk of injury caused by improper locked
nozzle.
Make sure you hear a click when insert-
ing the nozzle tip into the wand.
Pull the nozzle to make sure it is seated
properly before operating your unit.
Step 4
Attach the wand to the spray gun.
Step 7
Attach the high pressure hose to the spray
gun.
OPERATING INSTRUCTIONS
Important!
Do not run the engine with a high or low oil
level as this can cause engine damage.
If you have further questions regarding the
engine, please refer to the engines operating manual included with the unit.
Step 1
Check oil level on engine before starting
the unit. Oil level should always be between
the FULL and ADD marks on the dipstick.
Be sure the machine is level when checking the oil level. (Refer to the engines operating manual for seasonal grades.).
We recommend that the oil be changed after the first 5 hours of use, then once every
25 hours.
Step 2
Fill gas tank with unleaded gasoline.
Do not use leaded gasoline.
6
Step 3
Connect the high pressure hose to the units
high pressure outlet.
Step 4
Connect garden hose to units water inlet.
Step 5
Connect garden hose to the cold water
source and turn water on completely.
Do not use hot water.
Step 6
Trigger the gun to eliminate trapped air, wait
for a steady flow of water to emerge from
the spray nozzle.
Step 7
Pull the choke rod to the CLOSED position
Starting a Warm Engine:
If the engine has run out of fuel, pull the
choke rod to the CLOSED position after
refueling. If the engine has not run out of
fuel, leave the choke rod in the OPEN position.
Step 8
Engine with manual throttle:
Slide the throttle lever away from the SLOW
position, about 1/3 of the way toward the
FAST position.
Engine with fixed throttle:
Move the engine stop switch to the ON
position.
For more details see engine manual.
Step 9
Pull the starter handle.
If the engine fails to start after 3 pulls,
squeeze the trigger gun to release pressure, and repeat step.
After the engine warms up enough to run
smoothly, move choke rod to OPEN position and throttle to FAST position.
Initial Use of your Kärcher pump
All Kärcher pumps ship with oil already
inside direct from the factory. There is no
need to add oil.
Pump Inspection
You should routinely make a visual inspection of the pressure washers pump.
If you notice oil leaking around the pump
seals, you should take the pressure
washer to a Kärcher-authorized service
center for repair. (You can locate a service center in your area online at
www.karcher-usa.com/service.)
Pump Maintenance
The pump on your Kärcher pressure
washer does not require maintenance.
Any attempts to service or alter the pump
may damage your pressure washer and
void your product warranty.
USING THE ACCESSORIES
The color-coded quick connect nozzles provide a wide array of spray widths from 0° to
65° and are easily accessible when placed
in the convenient rubber nozzle holder,
which is provided at the handle of the machine.
Red nozzle = 0°
for particularly stubborn accumulation of
grime. Not recommended for soft mate-
rials like sidings, decks, painted surfaces,
cars.
Green nozzle = 25°
for dirt accumulation over a large surface.
White nozzle = 40°
for dirt accumulation over a large surface.
DANGER
High pressure in nozzle area.
Risk of injury caused by improper locked
nozzle.
Make sure you hear a click when insert-
ing the nozzle tip into the wand.
Pull the nozzle to make sure it is seated
properly before operating your unit. (See
page 5 step 5 + step 6)
7
Black detergent nozzle = 65°
for operating with detergent or cleaning
with negligible pressure.
WARNING
TO AVOID SERIOUS INJURY,
NEVER POINT SPRAY NOZZLE
AT YOURSELF, OTHER PERSONS
OR ANIMALS
WORKING WITH DETERGENTS
Detergents can only be applied with the
black nozzle.
Step 1
Install the black quick-connect low pressure
nozzle for detergent application at low pressure.
Step 2
Fill a container with Kärcher detergent.
Place the filter end of detergent suction
tube into the detergent.
Step 3
With the engine running, pull trigger to operate unit. Liquid detergent is drawn into
8
the unit and mixed with water.
Apply detergent to work area.
Do not allow detergent to dry on surface.
For best results see Cleaning Tips on
pages 10 & 11 for specific information
on how to clean different surfaces.
Always Use Kärcher
Detergents for Best Results.
Kärcher biodegradable detergents are specially formulated to protect the environment
and your pressure washer. Special formula
wont clog the suction tube filter and will protect the internal parts of the pressure
washer for a longer life. For Kärcher Detergents, check your retailer
or call our service center for help.
The following Kärcher detergents are
available in USA / Mexico:
All Purpose and Vehicle Wash
Exterior House Cleaner
Deck & Patio Cleaner
Heavy Duty Degreaser
The following Kärcher detergents are
available in Canada:
Vehicle Wash
Pressure Wash
Deck + Fence Wash
Degreaser
Caution Never use:
• Bleach, Chlorine products and
other corrosive chemicals
• Liquids containing solvents
(i.e., paint thinner, gasoline, oils)
• Trisodium phosphate products
• Ammonia products
• Acid-based products
These chemicals will harm the unit
and will damage the surface being
cleaned.
SHUTTING DOWN
Step 1
Remove detergent suction tube from container and insert into 1 gallon of fresh water.
Siphon water at low pressure for one
minute.
Step 2
Engine with manual throttle:
Move the throttle lever to the SLOW po-
sition.
Allow the engine to idle for a few sec-
onds, then move the throttle lever to the
STOP position.
Engine with fixed throttle:
Move the engine stop switch to the OFF
position.
For more details see engine manual.
Step 3
Turn off the water supply.
Step 4
Press trigger to release water pressure.
Step 5
Disconnect the garden hose from the water inlet on the unit.
Step 6
Disconnect the high pressure hose from the
high pressure outlet.
Step 7
Engage the gun safety lock.
TAKING A BREAK
... FIVE MINUTES OR MORE
Step 1
Engine with manual throttle:
Move the throttle lever to the SLOW
position to shot down engine.
Allow the engine to idle for a few seconds,
then move the throttle lever to the STOP
position.
Engine with fixed throttle:
Move the engine stop switch to the OFF
position.
For more details see engine manual.
Step 2
Press trigger to release water pressure.
Step 3
Engage gun safety lock.
WINTERIZING AND LONG-TERM
STORAGE
1.Disconnect all water connections.
2.Turn on the machine for a few seconds,
until the water which had remained in the
pump exits. Turn off immediately.
3. Drain the gas and oil from the engine.
4.Do not allow high pressure hose to
become kinked.
5.Store the machine and accessories in
a room which does not reach freezing
temperatures.
Caution: Failure to follow the above directions will result in damage to the pump
assembly and accessories.
9
Only for USA:
Kärcher also recommends the regular practice of using a pump protector like Kärcher
Pump Protector to help during storage in
the winter months.
CLEANING TIPS
Deck Cleaning
(with or without detergent)
Pre-rinse deck and surrounding area with
fresh water. If using Kärcher Deck & Patio
Cleaner, (Canada: Deck + Fence Wash)
place detergent suction tube directly into
cleaning solution and apply to surface at
low pressure. For best results, limit your
work area to smaller sections of approximately 25 square feet. Allow detergent to
remain on surface 1-3 minutes. Do not allow detergent to dry on surface. Rinse at
high pressure in a long sweeping motion
keeping the spray nozzle approximately 36 inches from the cleaning surface. Always
clean from top to bottom and from left to
right. When moving on to a new section of
the cleaning surface, be sure to overlap the
previous section to eliminate stop marks
and ensure a more even cleaning result.
Caution: Do not use Dirtblaster
nozzle on wood surface as it may cause
damage.
House Siding
10
(with or without detergent)
Pre-rinse cleaning surface with fresh water. If using Kärcher Exterior House Cleaner
(Canada: Pressure Wash), place detergent
suction tube directly into cleaning solution
and apply to surface at low pressure (for
best results, limit your work area to sections of approximately 6 feet and always
apply detergent from bottom to top). Allow
detergent to remain on surface 1-3 minutes.
Do not allow detergent to dry on surface, if
surface appears to be drying, simply wet
down surface with fresh water. Rinse at high
pressure from top to bottom in an even
sweeping motion keeping the spray nozzle
approximately 6 inches from the cleaning
surface.
Caution: Do not use Dirtblaster® Spray
Nozzle on siding as it may cause damage.
® spray
Cement Patios, Brick and Stone
(with or without detergent)
Pre-rinse cleaning surface with fresh water. If using Kärcher All Purpose and Vehicle Wash (Canada: Pressure Wash or De-
greaser), place detergent suction tube directly into cleaning solution and apply to
surface at low pressure. For best results,
limit your work area to smaller sections of
approximately 25 square feet. Allow detergent to remain on surface 1-3 minutes. Do
not allow detergent to dry on surface. Rinse
at high pressure in a sweeping motion keeping the spray nozzle approximately 3-6
inches from the cleaning surface. Always
clean from top to bottom and from left to
right. For removing extremely stubborn
stains, use Kärcher Dirtblaster® Spray
Nozzle.
Cars, Boats & Motorcycles
(with or without detergent)
Pre-rinse vehicle with fresh water. If using
Kärcher All Purpose and Vehicle Wash,
(Canada: Pressure wash or vehicle wash)
place detergent suction tube directly into
cleaning solution and apply to surface at
low pressure. For best results, clean one
side of vehicle at a time and always apply
detergent from bottom to top, do not allow
detergent to dry on surface. Rinse at high
pressure in a sweeping motion keeping the
spray nozzle approximately 6-8 inches from
the cleaning surface (distance should increase when rinsing pin-striping or other
sensitive surfaces). Always clean from top
to bottom and from left to right. For best
results, wipe surface dry with a chamois or
soft dry cloth.
Caution: Do not use Dirtblaster® Spray
Nozzle on vehicles as it may cause damage.
Barbecue Grills, Outdoor Power
CLEANING TIPS –
continued
Equipment & Gardening Tools
(with or without detergent)
Pre-rinse cleaning surface with fresh water. If using Kärcher All Purpose and Vehicle Wash or Heavy Duty Degreaser
(Canada: Pressure Wash or Degreaser),
place detergent suction tube directly into
cleaning solution and apply detergent at low
pressure. Allow detergent to remain on surface 1-3 minutes. Do not allow detergent to
dry on surface. Rinse at high pressure
keeping the spray nozzle approximately 36 inches from the cleaning surface. For removing extremely stubborn dirt, it may be
necessary to move the spray nozzle even
closer to the surface for greater dirt cutting
action. To remove caked on mud from garbage cans, lawn mower blades, wheel barrels or other nonsensitive metal surfaces,
you may want to use the Kärcher Dirtblaster® Spray Nozzle.
Caution: Do not use Dirtblaster® Spray
Nozzle on cloth, plastic or other sensitive
surfaces as it may cause damage.
Patio & Lawn Furniture
(with or without detergent)
Pre-rinse furniture and surrounding area
with fresh water. If using Kärcher All Purpose and Vehicle Wash (Canada: Pressure
Wash), place detergent suction tube directly
into cleaning solution and apply to surface
at low pressure. Allow Kärcher detergent
to remain on surface 1-3 minutes. Do not
allow detergent to dry on surface. Rinse at
high pressure in a sweeping motion keeping the spray nozzle approximately 3-6
inches from the cleaning surface. For best
results, clean from top to bottom and from
left to right.
Caution: Do not use Dirtblaster® Spray
Nozzle on patio or lawn furniture as it may
cause damage.
Recommendations
Before cleaning any surface an incon-
spicuous area should be cleaned to test
spray pattern and distance for maximum
cleaning results.
If painted surfaces are pealing or chip-
ping, use extreme caution as pressure
washer may remove the loose paint from
the surface.
When using on surfaces which might
come in contact with food, flush
surfaces with plenty of drinking water.
OPTIONAL CLEANING ACCESSORIES
Optional cleaning accessories are available
to further enhance your cleaning capabilities.
Dirtblaster® spray nozzle
Extension Hose
Hose Reel
11
TROUBLESHOOTING
Please remove the spark plug cable to
prevent accidental ignition of the engine
before making any repair.
Engine will not start.
• No gasoline.
- Fill gas tank.
• Choke is not in correct position.
- Slide choke lever out to closed
position.
• Engine throttle is not in correct
position.
- Slide the throttle lever up about 1/3 of
the way toward the fast position.
• Pressure built up in the high pressure
washer.
- Squeeze the trigger to release the
pressure.
For additional engine problems refer
to the engine owners manual.
Unit does not reach high pressure.
12
• Diameter of garden hose is too small.
- Replace with a 3/4 inch garden hose.
• Water supply is restricted.
- Check garden hose for kinks, leaks
and blockage.
• Not enough inlet water supply.
- Open water source full force.
• Water inlet filter is clogged.
- Remove filter and rinse out in warm
water.
• Black detergent nozzle is attached.
- Remove black detergent nozzle and
attach a high pressure nozzle.
Output pressure varies high and low.
• Not enough inlet water supply.
- Turn water on full force. Check garden
hose for kinks, leaks or blockage.
• Pump is sucking air.
- Check that hoses and fittings are air
tight. Turn off machine and purge
pump by squeezing trigger gun until a
steady flow of water emerges through
the nozzle.
• Water inlet filter is clogged.
- Remove filter and rinse out in warm
water.
• Spray nozzle is obstructed.
- Blow out or remove debris with a fine
needle.
• Calcified gun, hose or spray wand.
- Run distilled vinegar through detergent suction tube.
No detergent.
• Detergent suction tube not properly
connected to the machine.
- Check connection.
• Detergent is too thick.
- Dilute detergent. For best results, use
Kärcher detergent.
• Detergent filter valve is at lowest
setting.
- Set detergent filter valve to a higher
setting.
• Filter on detergent suction tube is
clogged.
- Run warm water through filter to
remove debris.
• Damaged or clogged detergent
suction tube.
- Remove obstruction or replace
detergent suction tube.
• A high pressure nozzle is attached.
- Replace with black detergent nozzle.
• Spray nozzle is obstructed.
- Blow out or remove debris with fine
needle.
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